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A movable test system for thermal performance of domestic solar water heating system is proposed to solve the problem that fixed test system has low utilization efficiency of climatic resources. The test system consists of a bus body, closed pipeline system, measurement and control system for temperature and flow, mobile electric cabinet, etc.. The temperature and flow in thermal performance test can be controlled respectively in -0.2 °C~+0.2 °C . The mathematic model of daily useful energy of the test system has been established. By analyzing measurement uncertainty components of daily useful energy, its relative expanded uncertainty is 3.2%. The movable system can make full use of climate resources of different geographical areas and improve test efficiency.

A Movable Test System for Thermal Performance of Domestic Solar Water Heating System and Its Uncertainty Analysis